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Patents for H. C. Hagen
Patents 1 - 3 of 3
Number	Date	Patentee	Title	Type
306,254	Oct. 07, 1884	G.M. Hopkins	Gas Engine	gas and gasoline engines
326,561	Sep. 22, 1885	L.N. Hopkins, G.M. Hopkins	Gas Engine	gas and gasoline engines
326,562	Sep. 22, 1885	L.N. Hopkins, G.M. Hopkins	Gas Engine	gas and gasoline engines

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